Snorkel strap



FIG. 1 is a top, front and left side perspective view of a snorkel strap showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a top plan view thereof. 

The ornamental design for a snorkel strap, as shown and described. 